* loop.c (insert_loop_mem): Ignore memory clobbers.

From-SVN: r30973

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5f98bda8864d9ae9acb1be324922f963bae9ee1f..4c898181a7e14beafe088b5c57476b1f2adeb387 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -6,6 +6,8 @@ Thu Dec 16 10:43:35 MET 1999  Jan Hubicka  <hubicka@freesoft.cz>
 
 Thu Dec 16 02:41:26 1999  Richard Henderson (rth@cygnus.com)
 
+       * loop.c (insert_loop_mem): Ignore memory clobbers.
+
        * combine.c (simplify_comparison): Reduce (OP (MINUS A B) 0)
        to (OP A B).
 

diff --git a/gcc/loop.c b/gcc/loop.c
index 573a76aad6a3bdf03a438d6d581e0fedeb5e8f96..b210a232e93a9388012794c1f805c1ac64bda0b8 100644 (file)
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -9643,6 +9643,10 @@ insert_loop_mem (mem, data)
     case MEM:
       break;
 
+    case CLOBBER:
+      /* We're not interested in MEMs that are only clobbered.  */
+      return -1;
+
     case CONST_DOUBLE:
       /* We're not interested in the MEM associated with a
         CONST_DOUBLE, so there's no need to traverse into this.  */